Electkic call bell



(No Model.)

D. BOYD. BLBCTRIUUALL BELL.

10.293,938. Patented Peb. .19, 1884.

ATTEST:l

NiTnD STATES PATENT Orricn.

DAN BOYD, OF MANCHESTER, ENGLAND, `ASSIGNOR TO THE DOMESTIC ELECTRICALMANUFACTURINGACOMPANY, OF BOSTON, MASS.

ELECTRIC CALL-BELL.

T0 @ZZ whom, t may concern:

Be it known that I, DAN BOYD, a subject of the Queen of Great Britain,and a resident of Manchester, England, have invented certain new anduseful Improvements in Electric Call-Be1ls, of which the following is aspeciii cation.v

The main feature of my invention consists in so constructing an electriccall-bell that each bell will be provided with its own battery on thesame base with the electro-mag` `more clearly.

The base c, which as usual,is made of wood orothersuitablenon-conducting material, has secured to it a frame, f,preferably of metal, carrying the coil or coils of the electro-mag netg. To this frame f is also secured the end of a metallic spring, k,electrically connected with one terminal of the coils, and carrying thearmature h,with its extension m,and.ham mer m2 for the gong, which isindicated by dotted lines in Fig. l.

I prefer to make the contact-spring z' for the circuit-breaker in onewith and a part of the spring 7c, supporting the armature and hammer,and this spring-finger z is adapted to make Contact with the adjustablescrew Z in the insulated post m, connected through the conductor 2 witht-he binding-post t.

vCombined with the parts above described, I mount on the base a one ormore hermetioallysealed cells,b b,ofbattery, two being shown in thedrawings. As a convenient position for these sealed cells,I have shownthem as adapted to recesses c c in the base underneath the gong, andretained in position by ayoke-piece,

cl, which may be in the form of a spring and binding-posts or and postsor terminals being mounted on the.

February 19, 1884.

(No model.) i

mounted on an extension, c, of the frame f. Each sealed cell is completein itself, and has metallic end ,pieces connected to its electrodes andforming terminals, and to the base are secured corresponding springcontacts, o o and o2 o, in the bottom of the recesses c, so thevconnections are made by simply placing the sealed cells in place withoutthe use of binding-posts or screw-couplings. The circuit from theterminal of the coils opposite that connected with the circuit-breakeris through the conductor g, spring-contact o, battery b, contacto,.conductor p, contact o2, battery b', contact o, and conductor 8, tothe bindingpost t.

The device above described forms a complete self-contained instrument,which is ready at any time to be put up and in operation by simplyconnecting the terminals of a line-wire (provided only with apush-button or equivalent) to the binding-posts t the trouble ofconnecting up a separate battery, with its necessary bindingposts,screws, or similar connections, being entirely dispensed with and l theerection of call-bell lines greatly simplified.

Vhen a sealed cell'b b becomes exhausted, it can be readily removed andreplaced by a duplicate, and the connections completed by simply layingthe substitute cell in position.

I claim as my invention- 1. As a new article of manufacture,theherein-described self-contained electrical call-bell, consisting of abase, an electro-magnetic bell and one or more battery-cells in circuittherewith, and two terminals or posts, all mounted on the said base, andthe. whole complete for use and operative on the closure of the circuit, substantially as set forth.

2. The combination of a base and an electromagnetic bell with one ormore detachable sealed cells of battery in circuit therewith, terminals,the bell, cells,

said base, and the whole constituting a selfcontained electric call-belloperative on the closure of the circuit, substantially as described.

3. The combination of an electro-magnetic bell and a detachable sealedcell of battery having terminals with a base carrying said IOO bell andbattery, and having oireuit-oonnee` 6. The combination of a baseandiaframe, f, tions' and spring-Contacts, substantially as'decarryingelectro-magnet, armature, hammer, sorbed, whereby the connections aremade on and Circuit-breaker, and having an extension, I 5 simply placingthe said cell in position. e, with sealed Cells of battery, andretaining- 5 4. rlhe combination of an electro-magnetic yoke carried bysaid extension of the frame. bell and base therefor with sealed cells ofSigned at New York, in the county of New battery mounted on said base,and a retaining York and State of New York, this 1st day of yoke forsaid Cells. 1 June A. D. 1883. 2o

5. The combination of an electro-magnetic DAN BOYD. 1o bell and sealedcells of battery with a base Vitnesses:

having recesses c, and contact-springs for the W'. H. VILDE, l

cells, substantially as set forth. XVM. H. BLAIN;

